Attachment-plug.



' M HERSKOVITZ.

ATTACHMENT PLUG. APPLICATION men NOV. 16, 1914.

Patented M11915.

0. YEW

MAX HEBSKQVITZ, OF CHICAGQ, ILLINOIS.

ATTACHMENT-PLUG.

- Specification of Letters Patent.

Patented Dec. 7, 1915.

Application filed November 16, 1914. Serial No. 8 72,13.

To all whom itmay concern citizen of the United States, and a residentof Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Attachment-Plugs, of which the following is declared to be a full, clear, and exact description. 4 p

This invention relates to attachment plugs for use in making electric connections between plugsockets and flexible conductors, and its principal object is to provide an extremely cheap, simple and efiicient plug, I capable of use in connection with the standard form of socket.

The invention consists in the several novel features of construction, arrangement and combination of parts hereinafter set forth and claimed.

The invention is clearly illustrated in the drawing furnished herewith, in which:

Figure 1 is a side elevation-of an attachment'plug embodying a simple form of the present invention; Fig. 2 is a vertical cross section taken on line 2-2 of Fig. 1; Fig. 3 is a vertical cross section taken on line3-3 of Fig. 2 Fig. 41 is a horizontal cross section taken on line H of Fig. 2; Fig. 5 is an end view looking in. the direction of the arrow, 5, in Fig. 3; Fig. 6 is a perspective view of the side contact'member detached from the body of the plug; and Fig. 7 1s a perspective view of aclip forming part of SEO the plug and serving to hold the end contact piece in place.

Referring to said drawing, the reference I numeral, 10, designates the body of the plug, 'which is made of non-conducting material, as of china or porcelain, or the like, having a cylindrical portion, 11,'for receiving the side contact member, 12, and provided at one end with a central opening, 13, for the admission of the flexible conducting members, and therebeyond formed with two conduits or passageways, 11, 15, one extending part way through the body and terminating in a laterally extending portion, 16, and the other extending from end to end of the body, 10. The short conduit leads to the side contact member, 12, and the long conduit leads to the end contact member, 17 i In the side of the cylindrical portion, 11, of the body, is formed a recessed portion, 18, for receiving a part, 12, of the side contact member, 12. Preferably, the

side contact member, 12, is constructed of light gage metal, and a metal block, 19, is inserted in the bottom of the depressed portron behind the part, 12, for receiving the binding screw, 20, which is threaded in registering holes formed in 'the part, 12, and block, 19. ductor cord leads through the conduit, 14, and is secured to the side contact piece by the binding. screw, 20.

The side member, 12, consists of a ringhke piece of contact metal-having the usual corrugatedthread-like part, '12", which is adapted to be screwed into the standard form of socket, and asmooth portion, 12, the end of which abuts against an annular shoulder, 21, formed on the body, '10. Movement of the side contact member in one direction relative to the body, is prevented by said shoulder, and movement in the other direction is prevented by the engagement of the inwardly bent part, 12, against the bottom of the recessed portion, and also by an inwardly dented portion, 22,

One ofthe wires of the conwhich enters a notch, 22 in the side of the body, opposite the recessed portion, 18." The end portion, 23, of the body is of less diameter than the part, 11, and is formed in its side with two diametrically opposite notches, 21; the adjacent end of the side contact member, 12, projects under the shoulder formedbetween 'the part, 11, and

reduced end, 23, and has two tongues or lugs, 25, which enter the notches, 24, and

prevent relative rotation between the body and s',de contact member.' 7

Th end contact member, 17, has a clip, 26, which isseated in a centrally disposed socket, 27, formed in one end of the body and said clip has two arms, 28, which are bent back from the main portion of the clip so as to diverge from each other, and when inserted in said socket, 27, they ongage with the lateral walls thereof with enough frictional contact to securely hold the clip in place in the socket. The outer contact piece, 29, of the end contact member is in the form of a washcrhaving a depressed portion, 30, for receiving the head of a binding screw, 31, which is threaded in the main portion of the clip, 26. vThe second wire of the conducting cord is ledment plug consist in, its simplicity of con-.

struction, the ease with which the parts may be assembled and secured together, and the reduction of the parts to a minimum number.

- forced into conductor cord, notches More orv less variation of the exact details of construction is parting from the, spirit of this invention, and I desire, therefore, notto limit myself to the exact-form of construction shown and described, butintend in the following claims to point out allj'of the invention disclosed herein. 1

I "claim as new Letters Patent 1. An. attachment pl'ugcomprising abody portion having 'two conduits for the wires of a conductor cord'and'formed with a re cessed portion'.-its side, and a ring-like, side contact-member surrounding the said body portion" and having a part thereof said recessed portion'of the bodyr 2; Anattacliment plug comprising a body for the wires of a in one end and a recessed-portion 1n .1tS-S1de, an end contact portion havingconduits 1 member secured in the end of the body por- 5 corrugated, screw tion,,and a/cylindrical, side contact member having a threaded, corrugated part formed with inwardly projecting portions seated in said-: nol'ches. and another inwardly- .depress'e dTp-art seated in said recessed' portion-.andthere provided'with a screw for attaching a-wire of the conductor cord thereto. 1;

- ,3. In an attachment plug, aside contact member comprisinga 'ring like member having a corrugated portion formed. with two inwardly extending lugs and portion of its side being depressed toward its interior and there provided with a hole for the reception of a screw, and a thicker block of material adj acentsaid depressed portion for receiving I th e shank the screw. v 4;. An attachment plug comprising a body "portion ha vi'ngftwo conduits for the wires of a conductor cord, and,a recessed portion its-side, one of s aid eonduits terminating at said; recessed' po rtion and one extending from end to end 'of said body portion, a ring-like, metal, side contactmember surrounding said body portion and having a threaded portion and a part bent inwardlyi to lie in'said recessed portion of the portion, and prevent endwise'moveme one member relative the -other,f's'aid inwardly bent part also possible without de-' and desireto secure by conductor for one of the Wires of side, and a notch in its side therebelow, and a ring-like, side contact member surrounding said body portion and having a corrugated, screw threaded portion arranged to lie in said recessed portion of the body portion, and forming a terminal for one wire of the conductor cord, said corrugated part having an inwardly projecting lug entering said notch in the body portion.

6. An attachment plug comprising a body portion having conduits for the wires of a cord, and reduced in diameter at one place to provide an annular shoulder, said reduced portion having a recess in its face opening to one of said conduits, and a ring-like, side contact member surrounding said reduced portion and abutting against said shoulder, said side contact member having a corrugated, screw threaded portion and a smooth portion formed witha depressed part lying in said recess and forming a terminal for one of the wires of the conductor cord.

7. An attachment plugcomprising a bod} portion having conduits for the wires of a conductor cord. one conduit extending from end to'end thereof, a centrally disposed socket in one end of said body portion, a metal clip sealed therein and having two diverging arms bea ring against the side walls of said socket to hold the clip in place, and an end contact piecehaving a screw threaded in said clip for securing one of the wires of the conductor cord thereto.

8. In an attachment plug having a centrally disposed socket in one end, a clip. for securing an end'contact piece thereto, and comprising a metal. body portion having diverging armsbent away therefrom and arranged to bear against the side walls of said socket, substantially as and for the purpose specified.

9. In an attachment plug, a body portion having a centrally located socket in one end and a conduit opening thereto adapted for the reception of a con uctor cord, and a clip adapted for connection with a conductor cord lying in said conduit, said clip having a-rmsprojecting from its main portion into said socket and secured in said socket.

MAX HERSKOVITZ.

Witnesses CHARLES O. Snnnvny,

.hNNA J. Conom,

Copies 10f this patent may lieobtained for five cents each, by'a ddressing the Commissioner of Patents,

: i Washington, D. G. 

